The flow field with moving boundary in a complex cylinder is simulated numerically in this thesis 本文对多级液压缸内动边界流场进行了分析和数值模拟。
Only by the simulation of the unsteady flow field with moving boundary , can the moving process be expressed faithfully 只有动态流场(也就是动边界流场)仿真,才能完整地描述运动全貌。
The transient flow field induced by a high - speed train moving into a tunnel is a three - dimensional , compressible and turbulent field . it ' s a field with boundary varying from indefinite to definite 它是由无限边界向有限边界过渡的一个流场,既不同于风洞试验中的有限边界流场,也不同于火箭、飞机所在的无限边界流场。
Although there are many papers on the numerical analysis of hydraulic - element flow fields , and make a good effect on improving the element properties , usually they only study steady flow field , which can not describe the whole moving process of hydraulic elements 液压元件内动边界流场的仿真,是了解与改进元件参数性能最有力的手段。以往液压元件内流场的数值仿真,仅限于稳态流场,它不能反映运动的全过程。
With the development of computer and computational mechanics , the numerical simulation of unsteady flow with moving boundary will be a fruitful research area . in this thesis , some significant progresses have been achieved in the numerical simulation of complex - cylinder flow field with moving boundary 随着计算机、计算流体力学的发展,液压元件内动边界流场的仿真,将成为一个研究方向,本文在这方面作了一些初步的工作。